(bug) Enhance Helm Dependency Resolution and Metadata Validation

[gianlucam76]

This PR addresses issues where Helm releases would fail or get stuck due to missing sub-charts or invalid semantic versioning metadata during the upgrade lifecycle. It introduces a more robust dependency management flow and sanitizes chart metadata to prevent "invalid semantic version" errors.

Fixes #1631

[gianlucam76]

Started with

apiVersion: source.toolkit.fluxcd.io/v1
kind: GitRepository
metadata:
  labels:
    test-deployment: "true"
  name: prometheus-27-1-0
  namespace: default
spec:
  interval: 0s
  ref:
    tag: kube-prometheus-stack-27.1.0
  timeout: 1m0s
  url: https://github.com/prometheus-community/helm-charts.git
---
apiVersion: config.projectsveltos.io/v1beta1
kind: ClusterProfile
metadata:
  name: test-profile
spec:
  clusterRefs:
  - apiVersion: lib.projectsveltos.io/v1beta1
    kind: SveltosCluster
    name: mgmt
    namespace: mgmt
  clusterSelector: {}
  continueOnConflict: false
  continueOnError: true
  helmCharts:
  - helmChartAction: Install
    releaseName: test-prometheus
    releaseNamespace: monitoring
    repositoryURL: GitRepository://default/prometheus-27-1-0/charts/prometheus
    values: |
      server:
        replicaCount: one
  reloader: false
  stopMatchingBehavior: WithdrawPolicies
  syncMode: Continuous

because of incorrect values ClusterSummary goes to failed state

  status:
    dependencies: no dependencies
    featureSummaries:
    - consecutiveFailures: 2
      failureMessage: |
        chart: , release: test-prometheus, failed to create resource: Deployment in version "v1" cannot be handled as a Deployment: json: cannot unmarshal string into Go struct field DeploymentSpec.spec.replicas of type int32
      featureID: Helm
      hash: L9feSuJgfU70RytYjSMeG5q1g8yYidQ6ArmW7ilaTF4=
      lastAppliedTime: "2026-03-10T18:29:12Z"
      status: Failed
    helmReleaseSummaries:
    - releaseName: test-prometheus
      releaseNamespace: monitoring
      status: Managing

fix the values

values: "server:\n  replicaCount: 1 \n"

ClusterSummary gets provisioned

  status:
    dependencies: no dependencies
    featureSummaries:
    - featureID: Helm
      hash: fd+1+Z4b5s1U4XaJQllKSOPg5Nin6eOXlz7B2If/tn8=
      lastAppliedTime: "2026-03-10T18:30:11Z"
      status: Provisioned